Ernest b



Unirse siains PATENT OFFICE...

ERNEST R. CROCKER, or s'rRA'rroRn, coNNRcTicUT, AssreNoR rro MANNING,

MAXWELL a MOORE, me., or NRW YORKL 1v. Y., A CORPORATION oF NEW JERSEY.

STOP-PIN FOR GAGE-mints.; v

To all whom t may concern A -Y Be it known that I,VV ERNEST B. CRooKiiR,A

The object of the invention is to provide l a stop pin which at alltimes will remain in contact with the glass or other cover of the gaget0 thereby insure theI pin at all times stopping the gage hand on thegraduated side of the dial. In other words, it is among the specialobjects of my invention to provide a stop pin for gage dials which willprevent the gage hand or pointer from slipping over the end thereof. Y

A further object of the invention is to provide a pin of the characterdescribed which is yieldablypositioned relative to the dial glass orother cover to thereby prevent injury to the glass or other cover duringshipment. l i

Further objects of the invention will appear more fully hereinafter.

The invention consists substantially in the construction, combination,location, and relative arrangement of parts, allV as will be more fullyhereinafter set'forth as shown by the accompanying drawing, and finallypointed out in thel appended claims.

' Referring to the drawing,-

' Figure l is a diagrammatic view in front elevation of a standard typeof gage' and i dial, parts broken away, and provided with a stop pinembodying my invention.

Fig. 2 is an enlarged sectional view ofa standard type ofgage'showi-ngthe stop pin of my invention in position therein. t

Fig; 3 is a'longitudinal sectional view of a stop pin embodying myinvention;

The same part is designated by the saine reference numeral wherever itoccurs throughout the several views.

Itis of common knowledge y'n the gage v vart that the pointer or hand ofthe gage frequently jumps over the usual stationary stop pin which isformed o r secured to the dial of the gage to form a limit stop zeroposition for the pointer or hand. It is the present. vpractice that whenthe pointer jumps over the stop pin it is necessary to Application filedFebruary 3, 1921. Seria1-No.'4`42,027.

specification of Letters Patent. y' Patented Apr. Y12, '1921. I

remove the glass and ring from the gage and disengage the hand from theback of the pin before placing. the gage inv opera'- tion. Whengages,`especially those employing glass or other fragile covers orplates' `Vare shipped, due to vibration and shock which is ordinarilyimparted thereto during shipment, it has been necessary to utilize astoppin which is out of contact with ther glass cover to prevent, due tovibration and shock, the cover being shattered and brokenv on the end ofthe stop pin. Under such circumstances, however,- theV pointer .very tfrequently has slipped over the stoppin y through the space between theend Vthereof and theglass, and this hasbeen a dificulty whichhasconstantly been encountered, es-

Y pecially in shipment ofA gages of this char-V acter. In largesizedVgages where the hand is long and necessarily very f1eXible,its

weight would cause the free end Vto bend toward the glass and inconsequence! jump over the stop pin, for it has notbeen practical tomake a rigid stop pin come in directy lcontact withtheglass for thereasons above stated, and many means have been suggested to. overcomethis difliculty, amongthein being providing thei'endk of the stop pinwith a Haring head, such-as a tack head,

but it has vbeen found from actual eXperic ence that a veryilargepercent.` of gagesv shipped inthe ordinary manner reach their destinationswith the hands or pointers in backY 0f the stop pins.

In accordance with my present invention I provide a stop in with; aVshouldered head, which at all times remains in Contact with the glass,and the other side'of the shoulder receiving thereon one end of ra smallcoiled spring, the other end of which.v

rests on thetop ofthe dial and exerts an upwardfpre'ssure'on the pin sothat the pin is maintained always in contact lwithithe underside of thecover, and thereby closes all space between'the end of the pin andthecover. In accordancewith my invention I` permanently afliX the pin tothe dial by 'flaring or brooming the end thereof behind the dial -platewhich prevents the pin from falling out, but at the same'time allowsthe' pin to vslide through the dial plate yield# ingly in accordancewith the pressure that is eXertedonrthe glass.k Referrin'gto the drawingas illustrating one embodiment of my invention I have shown at l astandard municates in the usual well known manner Vwith the interiormechanism of the gage,

which may vbe of any particular type to actuate the hand or pointer 3over the graduated scale 4 in the usual well'known way. At the Zeropoint of the gage, as is customary, I position the stop pin of myinvention designated 5. The gage is provided with the usual covergenerally made of glass as indicated at 6, which is held in placeV inthe usual well known` manner by means of the ring 7.y The stop pin 5 isprovided with the head 8 to form aJ shoulder 9 thereover, vagainst whichrests one end of a coiled spring 10, the opposite end of` which restsagainst the dial plate 11. It is understood that the stem of the pin 5is mounted to. slide freely against the tension of the spring 10 througha hole in the dial plate l1, and the pin is held in place inthe dial inany suitable manner, for example, by

the end l2 thereof being riveted or broomed sufficiently lto prevent itpassing through the hole in the dial. An easy method of splitting orbrooming this end and which I have found to be satisfactory for thispurpose is to previously have the pin drilled for a slightV depth and toa diameter that leaves a thin rim to rolll over, as clearly illustrated.in Fig. 3, where it will be seen that the rim 12 prevents the pin 5slipping through the.

dial plate 11.

I. have found thatthe stop pin of my present invention is of greatutility, espethe riveting of thepin to the enameled dial is eliminatedso as to enable the same to be used efficiently in that connection, withthe added advantage hereinb'efore stated, of preventing the hand'orpointer from jumping behind the stop pin.

It will lbe apparent that the stop vpin of my invention can be madequite long as there is no interference on the underside of the dial withany of the mechanism parts of the gage of the usual standardconstruction, and in this way it-is possible to have a variable lengthpin to accommodate for the; distance between the top of the dial and theunderside of the glassfor all types of gages where otherwise it would benecessary to carry different length pins or make a subsequent operationof facin off the surplus length. It will be appreciated that thisfeature is one of exceeding merit in the manufacturing of gagesemploying stop pins of .this character.

Many modifications and changes in details will readily occur to thoseskilled in the art without departing from the spirit and scope of myinvention as defined in the claims, but having now set forth the objectand nature of my invention, and having shown and describeda'structure'embodying the principles of my invention, what I claim asnew and useful and of my own invention and desire to secure by LettersPatent is,-V

l. In a gage, the combination with a dial face and a hand operatingthereover, a cover for said dial face, a stop pin for said hand, andmeans for maintaining said stop pin in contact with said cover. Y

2. In a gage, the combination with adialv said stop pin in the farthestprojected position vfi'omthe face of said dial.

5. In a gage, the combinationl with a dial plate and a hand operatingthereover, of a stop pin movably projecting through said dial, means foryieldingly maintaining said stop pin in the farthest projected positionfrom the face of said'dial, and means for limiting the movement of saidpin relative to said dial. c

6. The combination with a dial provided with an orifice therethrough, astop pin slidablyrpositioned in said orifice, and means for limiting themovement of saidV stop pin relative to said dial.

7. The combination with a dial provided with an orifice therethrough, ofa stop pin slidably positioned in said orifice, means for limiting themovement of said stop pin relaj tive to said dial, and means foryieldingly retaining said pin in its farthest projected position on oneside of said dial.

8. The combination with a dial provided with an orifice therethrough, ofa stoppin positioned in said orifice and provided at one end with ahead, andv a spring interposed between said dial and the head of saidstop pin.

9. The combination with a dial provided with an orifice therethrough, astop pin extending through said orifice on opposite f sides of saiddial, a coil spring surrounding said pin and positioned between one endthereof and said dial substantially as and for the purpose described.

l0. The combination with a diall provided i with an orificetherethrough, of a stop pin extending through said orifice on oppositelv 1,374,438 Y l 3 sides of said dial, the ends of said pin being formedto prevent the said pin becoming separated from said dial.

ll. The combination With a dial provided with an orifice therethrough,of a stop pin projecting through said orice and provided at one end witha head, a coil spring surrounding the shank of said pin and eXtendingbetween said head and the face of said dial, the opposite end of the pinbeing upset 10 and positioned in back of said dial to prevent the pinfrom becoming separated from said dial.

In testimony whereof I have hereunto set my hand on this 25th day ofJanuary A. D., 15 1921.

EST B. CROCKER.

